Submission #448545

#	Time	Username	Problem	Language	Result	Execution time	Memory
448545		grt	Distributing Candies (IOI21_candies)	C++17	29 / 100	139 ms	16984 KiB

candies

#include <bits/stdc++.h>
#define ST first
#define ND second
#define PB push_back

using namespace std;
using ll = long long;
using pi = pair<int,int>;
using vi = vector<int>;

const int nax = 200 * 1000 + 10;
int n, q;

ll pref[nax], mi[nax], mx[nax];

vi distribute_candies(vi c, vi la, vi ra, vi v) {
	n = (int)c.size();
	q = (int)la.size();
	pref[0] = 0;
	for(int i = 1; i <= q; ++i) {
		pref[i] = pref[i - 1] + v[i - 1];
	}
	mi[q] = mx[q] = pref[q];
	for(int i = q - 1; i >= 0; --i) {
		mi[i] = min(mi[i + 1], pref[i]);
		mx[i] = max(mx[i + 1], pref[i]);
	}
	vi ans(n);
	for(int i = 0; i < n; ++i) {
		int l = 0, r = q, mid;
		while(l <= r) {
			mid = (l + r) / 2;
			if(mx[mid] - mi[mid] <= c[i]) {
				r = mid - 1;
			} else {
				l = mid + 1;
			}
		}
		if(r == -1) {
			ans[i] = pref[q] - mi[0];
		} else {
			int pre = r + 1;
			if(mi[r] < mi[pre]) {
				// mx[pre] -> c[i];
				ans[i] = c[i] - (mx[pre] - pref[q]);
			} else {
				// mi[pre] -> 0
				ans[i] = pref[q] - mi[pre];
			}
		}
	}
	return ans;
}

//int main() {
	//ios_base::sync_with_stdio(0);
	//cin.tie(0);
	//int N, Q;
	//cin >> N >> Q;
	//vi c(N), l(Q), r(Q), v(Q);
	//for(int i = 0; i < N; ++i) {
		//cin >> c[i];
	//}
	//for(int i = 0; i < Q; ++i) {
		//cin >> l[i] >> r[i] >> v[i];
	//}
	//auto ans = distribute_candies(c,l,r,v);
	//for(int x : ans) cout << x << " ";
//}

• Subtask 1: 0 / 3
• Subtask 2: 0 / 8
• Subtask 3: 0 / 27
• Subtask 4: 29 / 29
• Subtask 5: 0 / 33